Abstract

Adiponectin has been recognized as a potent regulator of metabolism possessing anti-inflammatory and anti-atherogenic functions and inversely associated with increasing incidents of type 2 diabetes and obesity. In this study, we investigated the changes in adiponectin level of 193 Arab and 132 Asian women were compared. Overall, Arab women had statistically significant higher levels of adiponectin 17.84 (1.047) μg/mL than Asians 12.87 (1.049) μg/mL. In conclusion, our data demonstrates that Arab women poses high adiponectin level compared to Asians and the protective role of adiponectin in Arab women against metabolic disorders requires further attention.

Keywords

AdiponectinEthnicityObesityBMIArabAsian

To the Editor

Adiponectin has been recognized as a potent regulator of metabolism possessing anti-inflammatory and anti-atherogenic functions. Its level in human plasma is inversely associated with increasing incidents of type 2 diabetes, cardiovascular disease risk and obesity [1]. Significantly different levels of adiponectin have been reported in different ethnicities. For example, Asians have a lower adiponectin plasma level than Caucasians, which is consistent with the increased risk of metabolic disorders among Asians [1].

In this study, plasma level of adiponectin of 193 Arab and 132 Asian women living in Kuwait was assessed using the multiplexing immunobead array platform (Luminex, Austin, TX) using a 2-Plex kit (BioRad, Hercules, CA). All subjects gave their written consent to participate in the study. Full description of the study design was published by Elkum et al. [2]. Briefly, our samples were collected from the six governorates of the state of Kuwait, where random samples were collected from each stratum with proportional allocations. Adiponectin level are reported as geometric means and their standard errors according to BMI. BMI between 18.5 and 24.9 was considered lean, 25 to 29.9, overweight, ≥30 was considered obese). Clinical characteristics of the population are shown in Table 1.

Adiponectin level in Arab and Asian women. Ethnic difference in adiponectin level between Arab and Asian women at different BMIs. BMI between 18.5 and 24.9 was considered lean, 25 to 29.9, overweight, ≥30 was considered obese.

Caucasians have the highest reported adiponectin levels out off all ethnicities. Using an Asian population as a bench mark, adiponectin levels in lean Arab women might be higher than those in Caucasians. Araneta et al. reported that lean Caucasian women had a mean adiponectin level of 15.66 μg/mL, which is significantly lower than the 23.73 μg/mL concentrations reported in the current study [4].

In conclusion, our data shows that lean Arab women have a high adiponectin levels compared to Asians and potentially other ethnicities especially Caucasians. In the future, large cohort studies involving other ethnicities, mainly Caucasians, alongside Arabs will be beneficial to further demonstrate the role of adiponectin in this population.

Declarations

Acknowledgment

We would like to thank our study team for their efforts and excellent work. We are grateful to the Biochemistry and Molecular Biology Unit members, Clinical Laboratory and the Tissue Bank Core Facility at DDI for their contribution in performing the biochemical profile analysis and handling samples, respectively. We are also indebted to Kuwait Foundation for the Advancement of Sciences (KFAS) for financial support of this research project (RA-2010-004).

Competing interests

The authors declare that they have no competing interests.

Authors’ contributions

MA: data interpretation and wrote the manuscript. KB: Critically revised the manuscript. NE: principal investigator handled data management, data analysis and interpretation, and wrote the manuscript. Dr. Elkum, the study principal investigator, is the guarantor of this work and, as such, had full access to all the data in the study and takes responsibility for the integrity of the data and the accuracy of the data analysis. All authors read and approved the final manuscript.

Copyright

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.